/* | |
* Chromium OS Matrix Keyboard Message Protocol definitions | |
* | |
* Copyright (c) 2012 The Chromium OS Authors. | |
* | |
* SPDX-License-Identifier: GPL-2.0+ | |
*/ | |
#ifndef _CROS_MESSAGE_H | |
#define _CROS_MESSAGE_H | |
/* | |
* Command interface between EC and AP, for LPC, I2C and SPI interfaces. | |
* | |
* This is copied from the Chromium OS Open Source Embedded Controller code. | |
*/ | |
enum { | |
/* The header byte, which follows the preamble */ | |
MSG_HEADER = 0xec, | |
MSG_HEADER_BYTES = 3, | |
MSG_TRAILER_BYTES = 2, | |
MSG_PROTO_BYTES = MSG_HEADER_BYTES + MSG_TRAILER_BYTES, | |
/* Max length of messages */ | |
MSG_BYTES = EC_PROTO2_MAX_PARAM_SIZE + MSG_PROTO_BYTES, | |
}; | |
#endif |